Write a sentence that compares the values of the 9s in 199,204

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.